Extensive range of high quality replacement bearings, simply select from the drop down boxes
Up to 10 percent discount For multiple items
Chrome steel low friction bearings
Genuine UK Seller with fast delivery
All bearing dimensions are stated in the drop down boxes in the format ID x OD x H A° , A°)
ID = internal Diameter
OD = Outer Diameter
H = Height
A = Angle
Please note the rubber seal can vary in colour with the different size bearings
TH870 30.5 x 41.8 x 8H 45' MR042 MR121 MHP08 IS42
TH870E 30.5 x 41.8 x 8H 45' With lip on Inner Race MR121 MHP08F
TH873 30.2 x 41 x 6.5H 36' 45' TH873E TH873R MR054 MR122 MR115 MHP03k ZS44 ZS49 IS41
TH070 40 x 52 x 7H 45' MR128 MR170 MP-P16 TH070E TH070R
TH073 40 x 51.8 x 8H 36' 45' MR127 MR110 TH073R TH073E TH073s
MH-P21 37 x 48.9 x 7H 45' NO8c-138 MR151
P16H8 40 x 52 x 8H 45' ACB52 IS52
TH970 34 x 46.8 x 7H 45' MR082 MHP22 TH970E TH970DJ TH970S TH970R
MH- P03 30.15 x 41 x 6.5H 45' MHP03
TH800 30.2 x 41 x 7.8H 36' 45' MR075
P08H7 30.15 x 41.8 x 7H 45'
MR136 32.8 x 41.8 x 6H 45'
MR137 37 x 46.9 x 7H 45'
MH P25K 40 x 52 x 6.5 H 36' ZS56 EC49
TH872 30.2 x 41.5 x 6.5H 36' 36'
HOW TO IDENTIFY THE BEARINGS YOU REQUIRE
Quite often the manufacturer of your bike will store exploded diagrams that will demonstrate the bearings you require saving you disassembly before the new bearings arrive. These can often be found on their website or by contacting them directly.
Alternatively the old bearings can be removed and cleaned up. Simply measure the old bearings as accurately as possible bearing in mind excess corrosion can effect the dimensions. Start by measuring the internal and external diameters along with the height. Finally check both the internal and external angles.
To measure the internal angle simply place a business card inside the bearing at the widest point. If the side sit flush against the chamfer it is 45°. If the chamfer is steeper than the sides it is a 36°
Then simply use the drop down boxes to select the boxes you require. If for any reason we do not have the correct ones simply drop us a message and we will see what we can do
Naturally every bike is different so there can be slight differences. Start by installing the bike into a workshop stand and prepare the tools required. You will need Allan keys, Paper towel, Degreaser and grease
1. Start by loosening the pinch bolts on the stem, then remove the top cap
2. Remove the stem from the fork tube and rest gently
3. Remove the spacers, compression ring and dust seals, making note of the order as you do. you can thread a cable tie through to keep them in order and stop them from getting lost
4. The forks should now slide out, If it doesn't a gentle tap will normally free it
5. Remove the fork, then remove the upper and lower bearings from the cups along with any remaining seals. You can rest the fork in the headtube for the time being.
6. Spray on some degreaser and clean up the bearing cups and the crown race
7. Clean the bearings and any other part that is covered in grease
8. Apply some grease to the bottom bearing race, do not use too much or it will spill onto the frame
9. Take the new bearings, apply a little gease and place on the crown race of the fork. The bearings have a chamfer on both side, the side it the chamfer on the outside is the side that fits into the frame or the headset cup
10. Fit the fork back into the headtube of the bike. then grease and replace the top bearing. Making sure the chamfered outside edge goes into the frame
11. Lift up the fork and hold in place. Return the compression ring and seals onto the top of the bearing
12. Finally replace all the washers and spacers followed by the stem
13. Return the top cap and tighten the bolt until it takes up the slack. Its really easy to over tighten this bolt so ensure you give it minimal force or you can damage the bearings. If the bars feel stiff to turn you have over done it.
14. Take the bike out of the stand and give it a bounce on the ground to ensure everything is seated into place. To make sure the headset is correctly tighten squeeze the front brake and rock the bike back and forth. If you feel any knocking or play it will require further tightening
15. Align the front wheel with the bars by eye then finally tighten the pinch bolts to the correct torque. These bolts work as a pair so make sure they are evenly tightened
16. You are now ready to test ride
To prolong the life of your bearings, do not direct a high jet of water near areas of your bike where bearings are situated - an ingress of water can lead to premature bearing failure.